#255 All $label and $techn supports line breaks

[kirchsth]

implement #255

All $labels and missing $techn args support line breaks too (I think now we cover all with \n).

It can be tested with my extended branch

@startuml
' convert it with additional command line argument -DRELATIVE_INCLUDE="./.." to use locally
!if %variable_exists("RELATIVE_INCLUDE")
  !include %get_variable_value("RELATIVE_INCLUDE")/C4_Component.puml
  !include %get_variable_value("RELATIVE_INCLUDE")/C4_Deployment.puml
!else
  !include https://raw.githubusercontent.com/kirchsth/C4-PlantUML/extended/C4_Component.puml
  !include https://raw.githubusercontent.com/kirchsth/C4-PlantUML/extended/C4_Deployment.puml
!endif

Enterprise_Boundary(eb, "Enterprise\nBoundary") {
  Person(p1, "Normal\nUser\nLabel", "Description\nLine\nBreak")
  Container(c1, "Container\nLabel", "container techn\nwith line break", "Description\nLine\nBreak")
  Component(c2, "Component\nLabel", component techn\nwith line break", "Description\nLine\nBreak")
}

System_Ext(s1, "System Label\nWith\nLineBreak", "Description\nLine\nBreak")

Rel_(p1, c1, "A relation\nwith custom direction", "o-DOWN->>")
Rel_(p1, c2, "A relation\nwith custom direction", "and technology\nwith LBs", "o-RIGHT-o")

Rel(c1, c2, "A label\nwith\nline breaks", "and technology\nwith LBs")
Rel(c1, s1, "A linked label\nwith\nline breaks", "and technology\nwith LBs", $link = "http://www.plantuml.com")

Node(n1, "A node label\nwith\nline breaks", "type with\nline break", "description\nwith line break")
Node(n2, "A node label", "PlantUML packages have no automatic line breaks, line breaks are automatically inserted into type", "PlantUML packages have no automatic line breaks, line breaks are automatically inserted into description") {
  Container(cInNode, "A container in node")
}

!if %variable_exists("RELATIVE_INCLUDE")
  !include %get_variable_value("RELATIVE_INCLUDE")/C4_Dynamic.puml
!else
  !include https://raw.githubusercontent.com/kirchsth/C4-PlantUML/extended/C4_Dynamic.puml
!endif

Component(from, "From component")
Component(to, "To component")

Rel_("pre1", from, to, "A custom dynamic relation\nwith custom direction", "o-DOWN->>")
Rel_("pre2", from, to, "A custom dynamic relation\nwith custom direction", "and technology\nwith LBs", "+--+")
Rel(from, to, "A dynamic relation\nwith line break")
@enduml

Best regards
Helmut